没法启动MySQL数据库

问题：命令 $ systemctl start mariadb

报错 ：Job for mariadb.service failed because the control process exited with error code. See "systemctl status mariadb.service" and "journalctl -xe" for details.

命令$ journalctl -xe 找到问题反馈

查看MariaDB日记：

$ cd /var/log/mariadb

$vim mariadb.log

发现报错：/usr/libexec/mysqld: unknown variable 'default-character-set=utf8'

错误定位：mariadb的配置文件  /etc/my.conf 

从新修改配置以下：

[mysqld]
character-set-server=utf8

datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# Settings user and group are ignored when systemd is used.
# If you need to run mysqld under a different user or group,
# customize your systemd unit file for mariadb according to the
# instructions in http://fedoraproject.org/wiki/Systemd

[mysqld_safe]
log-error=/var/log/mariadb/mariadb.log
pid-file=/var/run/mariadb/mariadb.pid

#
# include all files from the config directory
#
!includedir /etc/my.cnf.d

再启动：$ systemctl start mariadb

成功！